li{
    list-style: none;
    float: left;
    margin-right: 40px;
}
header{
    box-sizing: border-box;
    padding-top: 30px;
    height: 100px;
    border-bottom: 1px solid #ccc;
}
body{
    background: white;
    color: black;
}
nav{
    margin-left: 100px;
}
.swiper-container {
    width: 100%;
    height: 300px;
  }
.swiper-slide {
    text-align: center;
    font-size: 18px;
    background: #fff;

    /* Center slide text vertically */
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    -webkit-justify-content: center;
    justify-content: center;
    -webkit-box-align: center;
    -ms-flex-align: center;
    -webkit-align-items: center;
    align-items: center;
  }
  .swiper-container .swiper-wrapper .swiper-slide img{
    width: 100%;
    height: 100%;
  }
main{
      margin-top: 115px;
  }
.activity{
   height: 1050px;
   display: none;
}
.activity_item{
  position: relative;
  top: 0px;
  left: 0px;
  z-index: 1;
  height: 200px;
  box-shadow: #ccc 2px 3px 10px 1px;
  margin-right: 50px;
  margin-bottom: 50px;
}
.activity_item::after{
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100px;
  background: url("../image/activity_bg.jpg") no-repeat;
  background-size: cover;
  filter: blur(10px);
  z-index: -1;
}
h2{
  height: 50px;
}
.join_button{
  height: 50px;
  background-color: blue;
  color: white;
  text-align: center;
  width: 100px;
  line-height: 50px;
  border: 2px solid black;
  float: right;
  margin-right: 20px;
  margin-top: 20px;
}
.join_button:hover{
  cursor: pointer;
  background: orange;
}
.meal img{
  width: 100%;
  height: 100%;
  
}
.meal{
  height: 880px;
  display: none;
}
.meal_show_item{
  margin-right: 50px;
  height: 200px;
  margin-bottom: 120px;
}
.meal_button{
  height: 30px;
  background-color: pink;
  color: white;
  text-align: center;
  width: 100px;
  line-height: 30px;
  border: 2px solid black;
  float: right;
  margin-top: 30px;
  margin-right: -65px;
}
.meal_button:hover{
  cursor: pointer;
  background: green;
}
.meal_more{
  height: 50px;
  background-color: gray;
  color: white;
  text-align: center;
  width: 200px;
  line-height: 50px;
  border: 2px solid black;
  float: right;
  margin-top: 70px;
  margin-right: -65px;
}
.meal_more:hover{
  cursor: pointer;
  background:#F60;
}
footer{
  height: 200px;
  text-align: center;
  line-height: 200px;
  border-top: 1px solid #ccc;
  color: black;
  box-shadow: black 2px 3px 10px 1px;
}
footer .footer_introduce{
  height: 100%;
}

.logo_xs_view{
  display: none;
}
@media screen and (max-width:480px) and (min-width: 100px){
  body{
    overflow:scroll;
  }
  .logo_md_view{
    display: none;
  }
  .logo_xs_view{
    display: block;
  }
  .logo_xs_view_menu{
    float: right;
  }
  .logo_xs_view_menu p{
    display: none;
  }
  .logo{
    float: left;
  }
  .logo img{
    margin-left: 100px;
  }
  nav{
    float: right;
    margin-right: -90px;
    z-index: 2;
    height: 200px;
    background-color: #F000;
  }
  nav ul li{
    margin-top: 20px;
  }
  .nav_md_show{
    display: none;
  }
  .nav_xs_view{
    display: none;
  }
  .swiper-container{
    height: 150px;
  }
  .activity{
    height: 1050px;
  }
  .meal{
    height: 1500px;
  }
}
@media screen and (max-width:768px) and (min-width: 481px){
  body{
    overflow:scroll;
  }
  .logo_md_view{
    display: none;
  }
  .logo_xs_view{
    display: block;
  }
  .logo_xs_view_menu{
    float: right;
  }
  .logo_xs_view_menu p{
    display: none;
  }
  .logo{
    float: left;
  }
  .logo img{
    margin-left: 125px;
  }
  nav{
    float: right;
    margin-right: -90px;
    z-index: 2;
    height: 200px;
    background-color: #F000;
  }
  nav ul li{
    margin-top: 20px;
  }
  .nav_md_show{
    display: none;
  }
  .nav_xs_view{
    display: none;
  }
  .swiper-container{
    height: 150px;
  }
  .activity{
    height: 1050px;
  }
  .meal{
    height: 1500px;
  }
}

@media screen and (max-width:993px) and (min-width: 769px){
  body{
    overflow:scroll;
  }
  .logo_md_view{
    display: none;
  }
  .logo_xs_view{
    display: block;
  }
  .logo_xs_view_menu{
    float: right;
  }
  .logo_xs_view_menu p{
    display: none;
  }
  .logo{
    float: left;
  }
  .logo img{
    margin-left: 125px;
  }
  nav{
    float: right;
    margin-right: -90px;
    z-index: 2;
    height: 200px;
    background-color: #F000;
  }
  nav ul li{
    margin-top: 20px;
  }
  .nav_md_show{
    display: none;
  }
  .nav_xs_view{
    display: none;
  }
  .swiper-container{
    height: 150px;
  }
  .meal{
    height: 1500px;
  }
}